Write a query to return every row in marketplace_orders with matching customer_id and customer_name from customers. Customer IDs are integers; customer_ref is text that may have leading zeros or surrounding spaces.
Match references written as a whole number (digits with an optional sign), so 2 and 02 can match the same customer. A non-integer reference, such as guest, or an integer without a customer match gives NULL customer fields. Keep each order exactly once and return order_ref and customer_ref exactly as stored.
Ordering: Sort by order_ref in ascending order.